Three-edge stepped milling cutter for aluminum

Abstract

The utility model relates to the technical field of milling cutters, and discloses a three-blade stepped milling cutter for aluminum, which comprises a cutter handle and a staged cutting part, the staged cutting part comprises a first-stage cutting part and a second-stage cutting part, the first-stage cutting part and the second-stage cutting part are respectively provided with a first-stage blade and a second-stage blade, the outer diameter of the first-stage blade is smaller than that of the second-stage blade, and the outer diameter of the second-stage blade is smaller than that of the second-stage blade. The first-stage cutting edge and the second-stage cutting edge each comprise a cutting edge front end face and a cutting edge rear end face, hollow channels are formed in the cutter handle and the stage type cutting part, first-stage channels and second-stage channels are formed in the first-stage cutting part and the second-stage cutting part, and first-stage channel inlets and second-stage channel inlets are communicated with the hollow channels. The first-stage channel outlet and the second-stage channel outlet are formed in the rear end face of the blade. The problems that a stepped milling cutter head is poor in cooling effect, and cut fines are not smoothly discharged are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of milling cutters, in particular to a three-blade stepped aluminum milling cutter. Background Art

[0002] In the field of metal processing, especially in the processing of aluminum alloy materials, the milling cutter is a key tool, and its performance directly affects the processing efficiency, processing accuracy and material surface quality.

[0003] Patent publication number CN216462024U discloses a three-edge stepped aluminum milling cutter, including a cutter head, a blade, a handle and a cutter seat. The utility model has the following beneficial effects: the cutter head has three front edges, the cutter head and the blade body are an integrated three-edge structure, the cutter head and the blade body are made of tungsten carbide hard alloy material, so that the milling cutter has strong wear resistance and heat resistance, the cutter groove is in a continuous spiral shape, which is convenient for discharging waste chips and improving milling efficiency, the first side edge and the second side edge are both in a spiral shape, the outer diameter of the first blade body is smaller than the outer diameter of the second blade body, which is convenient for selecting different step blades for milling according to different workpiece materials, thereby improving processing efficiency.

[0004] However, the stepped aluminum milling cutter of the above-mentioned patent still has some defects when used:

[0005] 1. The depth of machining of the stepped milling cutter head is deep, and the cooling effect of the coolant on the deep cutter head is poor;

[0006] 2. The overall tool length of the step-shaped milling cutter is long, and the fine chips cut out are not discharged smoothly. Utility Model Content

[0007] 1. Technical issues to be resolved

[0008] In view of the deficiencies in the prior art, the utility model provides a three-edged stepped aluminum milling cutter, which is used to solve the problems of poor cooling effect of the stepped milling cutter head and unsmooth discharge of cut fine chips.

[0009] (II) Technical solution

[0010] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0011] A three-blade stepped aluminum milling cutter comprises a shank and a stepped cutting portion, the stepped cutting portion comprises a primary cutting portion and a secondary cutting portion, a primary blade and a secondary blade are respectively arranged on the primary cutting portion and the secondary cutting portion, the primary blade and the secondary blade are spiral, the outer diameter of the primary blade is smaller than the outer diameter of the secondary blade, each primary blade and the secondary blade comprises a blade front end face and a blade rear end face, a hollow channel is arranged in the shank and the stepped cutting portion, a primary channel and a secondary channel are arranged on the primary cutting portion and the secondary cutting portion, the primary channel comprises a primary channel inlet and a primary channel outlet, the secondary channel comprises a secondary channel inlet and a secondary channel outlet, the primary channel inlet and the secondary channel inlet are connected to the hollow channel, and the primary channel outlet and the secondary channel outlet are arranged on the blade rear end face.

[0012] Preferably, in any one primary channel, the distance between the entrance of the primary channel and the end of the cutter head is smaller than the distance between the exit of the primary channel and the end of the cutter head, the primary channel is inclined toward the direction of the tool handle, the primary channel cools the primary cutting part and pushes the cut chips toward the tool handle; in any one secondary channel, the distance between the entrance of the secondary channel and the end of the cutter head is greater than the distance between the exit of the primary channel and the end of the cutter head, the secondary channel is inclined toward the end of the step-type cutting part, the secondary channel cools the secondary cutting part and pushes the cut chips outward.

[0013] Preferably, the angle between the line connecting the center of the first-level channel entrance and the center of the first-level channel exit and the horizontal line is a first-level angle, and the angle of the first-level angle is 25-65 degrees; the angle between the line connecting the center of the second-level channel entrance and the center of the second-level channel exit and the horizontal line is a second-level angle, and the angle of the second-level angle is 5-45 degrees.

[0014] Preferably, the number of the primary blades and the number of the secondary blades are both three, and each primary blade is circumferentially distributed outside the primary cutting portion, and each secondary blade is circumferentially distributed outside the secondary cutting portion.

[0015] Preferably, the end surface of each primary blade fits with the starting surface of the corresponding secondary blade, and the front end surface of each primary blade is tangent to the front end surface of the blade of the corresponding secondary blade.

[0016] Preferably, each group of primary channels includes all primary channels arranged at the same height on the primary cutting portion, and the primary channel outlets in the same group of primary channels are circumferentially distributed on the rear end surface of the blade of each primary blade; each group of secondary channels includes all secondary channels arranged at the same height on the secondary cutting portion, and the secondary channel outlets in the same group of secondary channels are circumferentially distributed on the rear end surface of the blade of each secondary blade.

[0017] Preferably, a group of primary channels are provided on the primary cutting part, and the primary channels are located on a side close to the end of the primary cutting part; a group of secondary channels are provided on the secondary cutting part, and the secondary channels are located on a side close to the handle of the secondary cutting part.

[0018] Preferably, the hollow channel is connected to a coolant or a high-pressure gas.

[0019] Preferably, a mounting groove is provided at the end of the shank at the position of the hollow channel, and a filter body is slidably installed in the mounting groove. The filter body includes a filter screen and a support ring. The filter screen is used to filter impurities in the coolant or high-pressure gas, and the support ring is attached to the inner wall of the mounting groove for easy disassembly.

[0020] (III) Beneficial effects

[0021] Compared with the prior art, the utility model provides a three-edge stepped aluminum milling cutter, which has the following beneficial effects:

[0022] 1. The three-blade stepped aluminum milling cutter has a hollow channel arranged in the shank and the step-type cutting part, and coolant or high-pressure gas is introduced into the hollow channel. The hollow channel is connected to the primary channel and the secondary channel in the primary cutting part and the secondary cutting part respectively, and the outlets of the primary channel and the secondary channel are arranged on the rear end surface of the blade to avoid contact with materials at the outlet during cutting, avoid wear and prevent fine chips from entering the hollow channel, and the coolant is sprayed from the primary channel and the secondary channel under the action of the centrifugal force generated by the rotation of the step-type cutting part to cool the tool, thereby improving the cooling effect and solving the problem of poor cooling effect caused by less coolant contact at the end of the step-type tool.

[0023] 2. The three-edge stepped aluminum milling cutter sets the primary channel to be inclined toward the side of the shank and sets the secondary channel to be toward the end of the step-type cutting portion, so that the fine chips generated at the primary cutting portion are pushed toward the side of the shank by the coolant or airflow sprayed from the primary channel, and then the coolant or airflow sprayed from the secondary channel on the secondary cutting portion pushes the fine chips to the outside, thereby avoiding the problem of fine chips being stuck in the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of the three-edge stepped aluminum milling cutter in the first embodiment of the utility model.

[0025] Figure 2 It is a front view of the three-edge stepped aluminum milling cutter in the first embodiment of the utility model.

[0026] Figure 3 It is a cross-sectional view of the staged cutting portion in the first embodiment of the present invention.

[0027] Figure 4 For this utility model Figure 3 A partial enlarged view of area A.

[0028] Figure 5 For this utility model Figure 3 A partial enlarged view of area B in the middle.

[0029] Figure 6 It is a top view of the cutter head part in the first embodiment of the utility model.

[0030] Figure 7 It is a structural schematic diagram of the end portion of the handle in the first embodiment of the utility model.

[0031] Figure 8 It is a cross-sectional view of the handle portion in the first embodiment of the utility model.

[0032] In the figure: 1. handle; 2. step-type cutting part; 3. hollow channel; 4. filter body; 11. mounting groove; 21. primary cutting part; 22. secondary cutting part; 210. primary blade; 220. secondary blade; 201. front end face of blade; 202. rear end face of blade; 203. knife groove; 31. primary channel; 32. secondary channel; 311. primary channel inlet; 312. primary channel outlet; 321. secondary channel inlet; 322. secondary channel outlet; 310. primary angle; 320. secondary angle; 41. filter screen; 42. support ring. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] Embodiment 1:

[0037] This embodiment provides a three-edge stepped aluminum milling cutter having the following technical features.

[0038] See also Figure 1-8 A three-blade stepped aluminum milling cutter comprises a shank 1 and a stepped cutting portion 2, wherein the stepped cutting portion 2 comprises a primary cutting portion 21 and a secondary cutting portion 22, wherein a primary blade 210 and a secondary blade 220 are respectively arranged on the primary cutting portion 21 and the secondary cutting portion 22, wherein the primary blade 210 and the secondary blade 220 are spiral-shaped, wherein the outer diameter of the primary blade 210 is smaller than the outer diameter of the secondary blade 220, and each of the primary blade 210 and the secondary blade 220 comprises a blade front end face 201 and a blade rear end face 20 ... A hollow channel 3 is provided in the shank 1 and the step-type cutting part 2, a primary channel 31 and a secondary channel 32 are provided on the primary cutting part 21 and the secondary cutting part 22, the primary channel 31 includes a primary channel inlet 311 and a primary channel outlet 312, the secondary channel 32 includes a secondary channel inlet 321 and a secondary channel outlet 322, the primary channel inlet 311 and the secondary channel inlet 321 are connected to the hollow channel 3, and the primary channel outlet 312 and the secondary channel outlet 322 are provided on the rear end surface 202 of the blade.

[0039] The coolant and airflow sprayed from the rear end face 202 of the blade cool down the next blade. There is a blade groove 203 between the rear end face 202 of the previous blade and the front end face 201 of the next blade. The fine chips generated by the blade cutting are located in the blade groove 203. If the outlets of the primary channel 31 and the secondary channel 32 are set in the blade groove 203, the fine chips will enter the hollow channel 3. Therefore, the outlets of the primary channel 31 and the secondary channel 32 are set on the rear end face 202 of the blade, which is also convenient for using coolant and airflow to push the fine chips out.

[0040] It should be noted that the primary cutting portion 21 is located at the end of the step-type cutting portion 2 , and the secondary cutting portion 22 is located between the primary cutting portion 21 and the handle 1 .

[0041] It should be noted that a plurality of N-level cutting parts may be provided between the secondary cutting part 22 and the tool handle 1 , and the outer diameters of the cutting edges of the N-level cutting parts increase sequentially.

[0042] It should be noted that, when a plurality of N-level cutting parts are provided between the secondary cutting part 22 and the tool handle 1 , a channel connected to the hollow channel 3 is also provided on the N-level cutting part for discharging coolant and airflow.

[0043] In an optional embodiment, in any one of the primary channels 31, the distance between the primary channel inlet 311 and the end of the cutter head is smaller than the distance between the primary channel outlet 312 and the end of the cutter head, and the primary channel 31 is inclined toward the direction of the tool handle 1, and the primary channel 31 cools the primary cutting portion 21 while pushing the cut chips toward the tool handle; in any one of the secondary channels 32, the distance between the secondary channel inlet 321 and the end of the cutter head is larger than the distance between the primary channel outlet 312 and the end of the cutter head, and the secondary channel 32 is inclined toward the end of the step-type cutting portion 2, and the secondary channel 32 cools the secondary cutting portion 22 while pushing the cut chips outward.

[0044] It should be noted that when multiple N-level cutting parts are arranged between the secondary cutting part 22 and the handle 1, the downwardly inclined channel is arranged on the N-level cutting part closest to the handle 1, and the upwardly inclined channels are arranged on the other cutting parts.

[0045] In an optional embodiment, the angle between the line connecting the center of the primary channel entrance 311 and the center of the primary channel outlet 312 and the horizontal line is a primary angle 310, and the angle of the primary angle 310 is 45 degrees; the angle between the line connecting the center of the secondary channel entrance 321 and the center of the secondary channel outlet 322 and the horizontal line is a secondary angle 320, and the angle of the secondary angle 320 is 15 degrees.

[0046] In an optional embodiment, the number of the primary blades 210 and the number of the secondary blades 220 are both three, and each primary blade 210 is circumferentially distributed outside the primary cutting portion 21 , and each secondary blade 220 is circumferentially distributed outside the secondary cutting portion 22 .

[0047] It should be noted that the primary blades 210 and the secondary blades 220 are distributed on a circle, but not necessarily evenly distributed on the circle, and the intersection angles of every two adjacent primary blades 210 or secondary blades 220 may be the same or different.

[0048] In an optional embodiment, the end surface of each primary blade 210 is aligned with the starting surface of the corresponding secondary blade 220 , and the front end surface 201 of each primary blade 210 is tangent to the front end surface 201 of the corresponding secondary blade 220 .

[0049] That is, the channel in the knife groove 203 is kept smooth, so that fine chips can be discharged along the knife groove 203 on the primary cutting part 21 and the secondary cutting part 22 .

[0050] In an optional embodiment, each group of primary channels 31 includes all primary channels 31 arranged at the same height on the primary cutting portion 21, and the primary channel outlets 312 in the same group of primary channels 31 are circumferentially distributed on the rear end surface 202 of the blade of each primary blade 210; each group of secondary channels 32 includes all secondary channels 32 arranged at the same height on the secondary cutting portion 22, and the secondary channel outlets 322 in the same group of secondary channels 32 are circumferentially distributed on the rear end surface 202 of the blade of each secondary blade 220.

[0051] In an optional embodiment, a group of primary channels 31 are provided on the primary cutting portion 21, and the primary channels 31 are located on a side close to the end of the primary cutting portion 21; a group of secondary channels 32 are provided on the secondary cutting portion 22, and the secondary channels 32 are located on a side of the secondary cutting portion 22 close to the shank 1.

[0052] In an optional embodiment, the hollow channel 3 is connected to a coolant or a high-pressure gas.

[0053] In an optional embodiment, a mounting groove 11 is provided at the end of the shank 1 at the position of the hollow channel 3, and a filter body 4 is slidably installed in the mounting groove 11. The filter body 4 includes a filter screen 41 and a support ring 42. The filter screen 41 is used to filter impurities in the coolant or high-pressure gas, and the support ring 42 is attached to the inner wall of the mounting groove 11 for easy disassembly.

[0054] That is, when it is needed to be used, the filter body 4 is installed in the installation groove 11, and when it is needed to be cleaned, the filter body 4 can be directly pulled out, which is simple and convenient to operate.

[0055] In summary, the three-blade stepped aluminum milling cutter has a hollow channel 3 arranged in the shank 1 and the step-type cutting portion 2, and coolant or high-pressure gas is introduced into the hollow channel 3. The hollow channel 3 is connected to the primary channel 31 and the secondary channel 32 in the primary cutting portion 21 and the secondary cutting portion 22 respectively. The outlets of the primary channel 31 and the secondary channel 32 are both arranged on the rear end face 202 of the blade to avoid contact with materials at the outlet during cutting, avoid wear and prevent fine chips from entering the hollow channel 3. In addition, under the action of the centrifugal force generated by the rotation of the step-type cutting portion 2, the coolant is sprayed from the primary channel 31 and the secondary channel 32 to cool the tool, thereby improving the cooling effect and solving the problem of poor cooling effect caused by less coolant contact at the end of the step-type tool.

[0056] The three-blade stepped aluminum milling cutter has a primary channel 31 arranged to be inclined toward a side of a shank 1 and a secondary channel 32 arranged to be arranged to be toward a side of an end of a stepped cutting portion 2, so that fine chips generated at the primary cutting portion 21 are pushed toward the side of the shank 1 by the coolant or airflow sprayed from the primary channel 31, and then pushed outward by the coolant or airflow sprayed from the secondary channel 32 on the secondary cutting portion 22, thereby avoiding the problem of fine chips being stuck in the tool.

[0057] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-edge stepped aluminum milling cutter, comprising a tool holder (1) and a stepped cutting portion (2), the stepped cutting portion (2) comprising a primary cutting portion (21) and a secondary cutting portion (22), the primary cutting portion (21) and the secondary cutting portion (22) being provided with a primary blade (210) and a secondary blade (220) respectively, the primary blade (210) and the secondary blade (220) being spiral-shaped, the outer diameter of the primary blade (210) being smaller than the outer diameter of the secondary blade (220), each of the primary blade (210) and the secondary blade (220) comprising a blade front end surface (201) and a blade rear end surface (202), characterized in that: A hollow channel (3) is provided in the tool handle (1) and the step-type cutting portion (2); a primary channel (31) and a secondary channel (32) are provided on the primary cutting portion (21) and the secondary cutting portion (22); a primary channel inlet (311) and a secondary channel inlet (321) are connected to the hollow channel (3); and a primary channel outlet (312) and a secondary channel outlet (322) are provided on the rear end face (202) of the blade.

2. A three-edge stepped aluminum milling cutter according to claim 1, characterized in that: In any one of the primary channels (31), the distance between the primary channel inlet (311) and the end of the cutter head is smaller than the distance between the primary channel outlet (312) and the end of the cutter head, the primary channel (31) is inclined toward the direction of the tool handle (1), the primary channel (31) cools the primary cutting portion (21) and pushes the cut fine chips toward the tool handle; in any one of the secondary channels (32), the distance between the secondary channel inlet (321) and the end of the cutter head is larger than the distance between the primary channel outlet (312) and the end of the cutter head, the secondary channel (32) is inclined toward the end of the step-type cutting portion (2), the secondary channel (32) cools the secondary cutting portion (22) and pushes the cut fine chips outward.

3. A three-edge stepped aluminum milling cutter according to claim 2, characterized in that: The angle between the line connecting the center of the primary channel entrance (311) and the center of the primary channel exit (312) and the horizontal line is the primary angle (310), and the angle of the primary angle (310) is 25-65 degrees; the angle between the line connecting the center of the secondary channel entrance (321) and the center of the secondary channel exit (322) and the horizontal line is the secondary angle (320), and the angle of the secondary angle (320) is 5-45 degrees.

4. A three-edge stepped aluminum milling cutter according to claim 3, characterized in that: The number of the primary blades (210) and the number of the secondary blades (220) are both three, and each of the primary blades (210) is circumferentially distributed outside the primary cutting portion (21), and each of the secondary blades (220) is circumferentially distributed outside the secondary cutting portion (22).

5. A three-edge stepped aluminum milling cutter according to claim 4, characterized in that: The end surface of each primary blade (210) fits with the starting surface of the corresponding secondary blade (220), and the blade front end surface (201) of each primary blade (210) is tangent to the blade front end surface (201) of the corresponding secondary blade (220).

6. A three-edge stepped aluminum milling cutter according to claim 3, characterized in that: Each group of primary channels (31) comprises all primary channels (31) arranged at the same height on the primary cutting portion (21), and the primary channel outlets (312) in the same group of primary channels (31) are circumferentially distributed on the blade rear end surface (202) of each primary blade (210); each group of secondary channels (32) comprises all secondary channels (32) arranged at the same height on the secondary cutting portion (22), and the secondary channel outlets (322) in the same group of secondary channels (32) are circumferentially distributed on the blade rear end surface (202) of each secondary blade (220).

7. A three-edge stepped aluminum milling cutter according to claim 6, characterized in that: A group of primary channels (31) is provided on the primary cutting portion (21), and the primary channels (31) are located on a side close to an end of the primary cutting portion (21); and a group of secondary channels (32) is provided on the secondary cutting portion (22), and the secondary channels (32) are located on a side of the secondary cutting portion (22) close to the shank (1).

8. The three-edge stepped aluminum milling cutter according to claim 3, characterized in that: The hollow channel (3) is connected to a coolant or a high-pressure gas.

9. A three-edge stepped aluminum milling cutter according to claim 8, characterized in that: The end of the shank (1) is provided with a mounting groove (11) at the position of the hollow channel (3), a filter body (4) is slidably mounted in the mounting groove (11), the filter body (4) comprises a filter screen (41) and a support ring (42), the filter screen (41) is used to filter impurities in coolant or high-pressure gas, and the support ring (42) is fitted on the inner wall of the mounting groove (11).

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